Damon, you can get the 10 amp allright, just better for long life not to depend on the ~12 amp overcurrent protection as that may cause shorter life, even though plenty use these supplies in that manner. I have many used and some new sp-240-48 if you like to try them. Cor
> On Sep 8, 2016, at 9:25 AM, damon henry via EV <[email protected]> wrote: > > Thanks Cor for the feedback. I had not considered the need to limit the > current beyond the internal overcurrent protection. I will have to look into > that further as well. That might actually be enough to swing me in a > different direction. I have been very happy with a 6 amp charging solution > for my motorcycle from a Chinese lithium charger. I have verified with the > manufacturer that I can get the same charger with the cutoff voltage I want, > but decided to also try out the Meanwell. The price for both solutions is > comparable but the 10 amp charging vs 6 amp seemed like a significant > advantage for the Meanwell route, but maybe not as significant if I need to > dial that back... > damon > >> Date: Thu, 8 Sep 2016 09:04:19 -0700 >> To: [email protected] >> Subject: Re: [EVDL] Prepping power supply as onboard charger >> From: [email protected] >> >> Definitely put it in a dry place and if you can mount it with some shock >> absorbing then that might be beneficial, but the frame of a vehicle >> typical does not move fast enough to put a lot of stress on electronics, >> it is more the vibrations and an EV has a lot less of those. >> Note that Meanwell supplies are typically spec'ed to work off AC and DC >> power and we have used them in large numbers in test setups for 48V >> power, but those do not get powered off very often, so I cannot speak >> about how it holds up with daily power cycling. >> Another thing is the current limit that is required for a charger: the >> Meanwells have a built-in overcurrent protection, which means that you >> will be running the supply at 110 - 120% output all the time. They >> typically also have an overtemp protection, but make sure that you are >> not giving them a short unhappy life by constant pushing them to the >> edge of their operational environment. >> It is relatively simple to add a small circuit to measure current and >> affect the 2.5V voltage reference to throttle back the supply at a lower >> current than its overcurrent protection limit. >> Hope this gives some ideas, >> >> Cor van de Water >> Chief Scientist >> Proxim Wireless >> >> office +1 408 383 7626 Skype: cor_van_de_water >> XoIP +31 87 784 1130 private: cvandewater.info >> >> http://www.proxim.com >> >> This email message (including any attachments) contains confidential and >> proprietary information of Proxim Wireless Corporation. If you received >> this message in error, please delete it and notify the sender. Any >> unauthorized use, disclosure, distribution, or copying of any part of >> this message is prohibited. >> >> >> -----Original Message----- >> From: EV [mailto:[email protected]] On Behalf Of damon henry via >> EV >> Sent: Thursday, September 08, 2016 8:40 AM >> To: EV List >> Subject: [EVDL] Prepping power supply as onboard charger >> >> I am looking to upgrade my truck to lithium and I'm investigating >> charging options. I decided to test out a Meanwell SP-480-48. I found >> a brand new one on Ebay for $90. According to the spec sheet >> (http://www.meanwell.com/webapp/product/search.aspx?prod=sp-480) they >> are adjustable from 41 - 56V. This fits within the range I use on my >> 48V motorcyle where I currently charge to 54.6 volts, as well as half my >> proposed 96 volt pack for my truck which I think I will want to charge >> to 49.8 volts. The thought is to set the voltage where I want the pack >> to end up and just let it charge. I will test this on my bench to make >> sure I'm happy with the results. >> If I am happy with the results, I am then concerned with two items if I >> want to make an onboard charger for my truck out of two of these. >> First, is inrush current. It does not appear these are built to be >> constantly reconnected to Line voltage as the spec sheet indicates they >> have a typical inrush current of 20 amps on 115v AC. So I would need to >> design a simple inrush limiter, automated would be preferred, although a >> simple switch with a resistor wired across it is not out of the >> question. Any suggestions on simple automated inrush circuits? My >> second concern is that I doubt these are meant to travel. If I were to >> crack it open and take a look at the guts, what would be typical things >> to look for in order to ruggedize this for a mobile life. Would it be >> easier to be sure that it is mounted in a dry ventilated space with some >> kind of rubber mounting or to actually try to protect the components on >> the board itself. >> Damon >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160908/fee2 >> 7480/attachment.htm> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at NEDRA >> (http://groups.yahoo.com/group/NEDRA) >> >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Read EVAngel's EV News at http://evdl.org/evln/ >> Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160908/981499df/attachment.htm> > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Read EVAngel's EV News at http://evdl.org/evln/ > Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
